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List of faceted rubies greater than 10-carats in weight

List of gem-quality faceted rubies greater than 10-carats in weight arranged in descending order of weights

S/N

Name

Carat Weight

Origin

Cut-Shape

Present Owner

1

Prince’s Ruby

174.67

unknown

unknown

Bowers Museum

2

Rosser Reeves

138.70

Sri Lanka

cabochon star

NMNH Smithsonian

3

DeLong Star

100.32

Burma

cabochon star

AMNH New York

4

Nga Mauk

98.00

Mogok Burma

unknown

unknown

5

Kallahpyan

74.00

Mogok Burma

unknown

unknown

6

Maung Lin-1

70.00

Burma

unknown

unknown

7

J.P.Morgan-2

67.00

Sri Lanka

asymmetrical

AMNH New York

8

Mandalay

48.019

Mogok Burma

cushion

unknown

9

J.P.Morgan-1

47.00

Burma

irregular cabchon

AMNH New York

10

Unnamed

46.75

Burma

oblong

unknown

11

Maung Lin-2

45.00

Burma

unknown

unknown

12

Forster-2

39.50

Mogok Burma

drop-shaped

unknown

13

Unnamed-set world record price for single ruby

38.12

Burma

cabochon

sold 1993 by Burma Gems Enterprise

14

Unnamed

36.00

Burma

unknown

sold by Mindon Min for £30,000

15

Unnamed-set in ring

32.67

Mogok Burma

oval

sold 2000 by Christie’s

16

Forster-1

32.30

Mogok Burma

cushion

unknown

17

Unnamed-set in ring

32.08

Burma

unknown

sold 1989 by Sotheby’s

18

Star of Bharany

27.62

probably Burma

oval cabochon star

House of Louis XV

19

Unnamed-mounted in diamond pendant

27.37

Burma

pear

unknown

20

Unnamed-auction record for star ruby

26.40

Burma

cabochon star

sold 1994 by Christie’s

21

Unnamed-set in ring

25.70

unknown

unknown

sold 1988 by Christie’s

22

Unnamed-12-rayed star ruby

25.20

Sri Lanka

cabochon star

unknown

23

Peace Ruby

25.00

Mogok Burma

round brilliant

unknown

24

Unnamed

24.20

unknown

cushion

sold 1989 by Christie’s

25

Unnamed

24.13

Sri Lanka

cabochon star

unknown

26

Unnamed

22.00

Mogok Burma

unknown

bought by Indian dealer named Chodilla

27

Chhatrapati Manik Ruby

20.70

unknown probably Burma

oval cabochon

unknown

28

Nga Boh

20.00

Mogok Burma

unknown

unknown

29

Unnamed

16.51

Burma

cushion

sold 1993 by Sotheby’s

30

Unnamed-mounted in ring

16.20

Mogok Burma

unknown

sod 1990 by Christies

31

Alan Caplan

15.97

Mogok Burma

cushion

Sultan of Brunei

32

Unnamed

15.00

Burma

pear

private European collector

33

Unnamed

14.00

unknown

cushion

sold 1990 by Christie’s

34

Unnamed-mounted in ring

12.50

Burma

unknown

sold 1990 by Christie’s

35

Unnamed-mounted in ring

12.22

Burma

cushion

Sotheby’s 1995

36

Unnamed-mounted in ring

12.10

unknown

unknown

sold 1992 by Christie’s

37

Unnamed

10.35

unknown

cushion

sold 1988 Christie’s

38

Unnamed

10.11

Burma

cushion

sold 1994 Christie’s

39

Unnamed

10.01

unknown

cushion

sold 1989 Christie’s

Above is a list of gem-quality faceted rubies greater than 10-carats in weight, arranged in descending order of weights. In this list the number of rubies greater than 100-carats in weight are only three. The number of rubies between 50-100 carats in weight are only four, and the number of rubies between 10-50 carats in weight are 32. Thus as the size of the rubies decrease the frequency increases. If we can have another category of less than 10-carats in weight the frequency will be even much greater than 32. The obvious conclusion we can derive from this observation is that rubies are generally restricted in size. Rubies of more than 100 carats in weight are extremely rare. The main reason for this is that chromium atoms present in the crystal lattice of ruby, that are responsible for the red color of rubies, also interfere with the growth of the crystals, causing cracks and fissures in the crystal. Thus it is extremely rare for a natural ruby to grow to enormous sizes without the crystal structure being disturbed. The presence of flaws and inclusions in rubies is a common occurrence and is a hallmark of its natural origin.

Another important observation that can be made from the above table is that out of 39 rubies listed 32 rubies are of Burmese origin, and only 4 rubies are of Sri Lankan origin. This is more than enough statistical evidence to show that Burma (Myanmar) is the premier source of rubies in the world. Out of the four Sri Lankan rubies listed three are star rubies. In fact Sri Lanka is the main source country in the world renowned for its star rubies, followed by Burma. Out of six star rubies listed 3 are from Sri Lanka and the other three are from Burma.

Out of the 39 rubies listed 11 are of Mogok origin, and the remaining are from other regions of Burma, Sri Lanka, or of unknown origin. This clearly shows that the Mogok region of Burma had been one of the main sources of Ruby in the world.